1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98198c1c514e56c50a4f36d37cb9ba3f4e66846e39ce6f0a0d72e8218a696d1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7180e084-9b2a-4264-aef4-c6bbea335799.json and https://artists.proofprofile.net/proofs/artist/7180e084-9b2a-4264-aef4-c6bbea335799.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149e9b9947b3030079a5903d4ad597c54316233f102101a3511f63514bc11eb8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21102752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e4c17651703e54bb6e7f56fd889784e96cf70c4ba26968832d80f68ceaa3c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21102753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf554398f100ff72cb79a71716992fca7643ef736b7aadd2aa73d728e88bd60d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21102754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1072280f421e13f64432ee354620356403dac53a5dee37195de741fe5c66698. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21102755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c0a0141537769e8f6f33f67e922cecd2042f203df74a3dcbe20833b85225f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21102757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c5e17f9858b6abe170f02ec0ac1643bb8affc6cf6956b2e9c1f7f92f0e419c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21102758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b22d5ad595f9be6d5d6a5c6c2e8f2610d2545cca690003b3ae196a7efbb1176. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21102759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d0ba44e5520e2a1091bd4dcf7bb3c48617db974f63f5a43d1c3d2ab4a756fa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21102760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5008a47b38f84261487bb427e735a7ac5f18beedcbe1c9036a5b78505236cd03. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21102761.
Machine Gun Love Song (feat. Sonicberry Favour)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca457fb5b81e1f9341f9259b78ecea7073fa98f6742159f2cbdbcae6dec90ce1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6708fa22422e6681cd5888b2f2daf2287f0fa8cce2a8bdd3ec9f338f50dc31e5. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e4a6742ba57235b3f491006a1f51f032349bfdc0883c24c8609b590c0e13ab. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235e3e2c386a3b94fa64f762f1cbaa00e1b8255f1ac64ec73fa55b3ca41ff6be. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4af0ba9caec20894a3565075079a5f6cc9c6c3255777a30496ea48443b8037. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5221e895ef7103e749115012f34d35e133bcbc6ff1d80bcb7a2265b2c50c19b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cc1744c814db32aab111080fa0fd91f024e445be170f1e4e33f2f56534d95d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103834.
Shabondama Holiday (feat. Naivepop or Petitfool)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b90d215f01ef0fba0e9c115f25aacf848abd238bace6c0a1236193866d2b82e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103835.
Panda To Watashi (feat. natural graphity)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6c78622ea2feea88185e1746be551901eab372bc8016e00162a72c001dda1d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa291fde577d6236fe80b89bd0811b4fcd4545c58ccf4175960c6109b73dd11de. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103837.
Applique Remix (Remix By Masahiro Nishioka)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26bb33026762ca9dd8aa2a551e6d21ec43df186149c0e7c6fb1d65de29e193e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103838.
Okashina Suiyoubiremix (Remix By Plus-tech Squeeze Box)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5d9edacfce5bf4b76176744ff8d179dcae5ae1ef4b3969ffc58eaaa4063226. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736832e5986b8fac52cd10d19ab73c3ec88d4f289360dc94af37c2b44f3dcdf6. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e4153b6c0b524ef422fdc04487d97fcb301ac5587a213127c36f026c9c66da. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103842.
Manicure Groove (feat. Hazel Nuts Chocolate & Yuppa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8e6789af782d4bfcd1a0d8ede64f1f0ba62f349f55c75085468dff5b82e829. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103843.
Twinkle of the Stars, Little Stars, Shining Stars (feat. YMCK & Aprils)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c87d84423ffccdf832728af4f65ea3797891ecf665b67e4c7b585a99ec4eaa4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b9fd7f23b04ff9a2615d896b7c3f0f7a7fece90a205231dca6e5ace1cc8661. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f66fce7f8f2f9dc019dbad4050a1f19b61bbc622d475cf43efef7ec5e2cedd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103846.
Strawberry Machine & Macdonald Duck Eclair
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112aac300a50450f0ff671423bfc1cb0db06b0de1adaea88e8598384d34ea4b2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103847.
Skaters Waltz (feat. Micro Mach Machine)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e05c23b83cff31510fb6b5b321373ea42fba320ae41e8c9778f527e7a3d5c8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a3faf1ca7448ff28cb3968eacbdf3df298db03e3a1eafe0cec39693a376a7c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103849.
Melon Soda (feat. Naivepop or Petitfool)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e952d7752376740cf03f4a3343f3eaf49a0a46be7906274f0b50f8e467c168. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103850.
Free Arrows (feat. Usagi-Chang, Socopo & Akira Suzuki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bb5e5d83327ca0009a1de32980c7640faa0b65d86198ea0d0e52f61cee27d2. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21103851.